Repeater for quadruple



(No Model.) 2 Sheets-Sheet 1.

T. R. TALTAVALL.

REPEATER FOR QUADRUPLEX TELEGRAPHS. No. 320,311.

Patented June 16, 1885 Emma/mm 3313M who mmaslilblavall w/iwmw 0, QM

v 2 Sheets-Sheet 2.

(No Model.)

T. R. TALTAVALL.

REPEATER FOR QUADRUPLEX TELEGRAPHSQ No. 320,311. Patented June 16, 1885.

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UNITED STATES PATENT. OFFICE.

THOMAS It. TALTAVALL, OF BROOKLYN, NEW YORK.

REPEATER FOR QUADRUPLEX TELEGRAPHS.

SPEQIFICATION forming part of Letters Patent No. 320 311, dated June 16, 1885.

Application tiled March 20, 1885. (No model.)

To all whom it may concern:

Be it known that I, THOMAS R. TALTAVALL, a citizen of the United States, residing in Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Repeaters for Quadruplex Telegraphs, of which the following is a specification.

The invention relates to the class of apparatus employed for repeating from a quadrupleX telegraph-circuit upon a single side or branch circuit, and for transmitting from the latter through the quadruplex circuit.

The object of the invention is to provide convenient, efficient, and simple means whereby an operator upon the single wire or branch circuit may send messages to or receive them from the distant station of the quadruple); system, or, in fact, any station included therein, and in like manner communicate with any star tion connected with another similar single-wire or branch circuit connected with the distant station of the system, and to accomplish this without interfering with the operation of any one of the remaining instruments of the system.

Apparatus have been devised for communicating through quadruplex systems in this general manner, but it has heretofore been necessary to use one-half the quadruplex in struments in communicating to or from the branch circuit. By my invention it is rendered possible to attach a single wire to the quadruplex system in such manner that an operator upon that wire may send to or receive from the distant station of the quadruplex system, or to or from a branch or single wire connected withthe system at the distant station, by employing only one-fourth of the quadruplex systemthat is to say, without interfering with the operation of the remaining three instruments while employing one.

In carrying out the invention the only additional instruments required beyond those ordinarily employed in the quadruplex system are a relay, a transmitting-key, a repeating-sounder, and a three-point button-switch. \Vhen messages are to be repeated from the quadruplex system,the single-wire connections are made through arepeating-sounder applied to one of the relays of the quadruplex system which acts as a key in the main circuiaof the single wire. Then it is desired to transmit to or receive from the station upon the branch circuit, independently of the quadruplex, the connections are made with a conductor including a key for transmitting into the single wire and a relay operating a sounder in the usual manner. The single wire may, on the other hand, be connected with a conductor including the additional key and relay, the latter being arranged to control the connections of the usual local circuit in which one of the quadruplex transmitters is included. By means of this relay the operator upon the single wire is enabled to transmit into the quadruplex system. In other words, the switch may be placed in either of three positions-the first of which permits the operator upon the single 'wire to receive messages from the quadruplex system; the second disconnects the single wire from the quadruplex system entirely and per mits it to be employed in the manner of a single independent main-line wire,.and the third permits that operator upon the single wire to transmit into the quadruplex system.

In theaccompanying drawings, Figure l is a diagram showing the organization of the circuits and apparatus at one station of a quadruplex system,which will be sufficient to illustrate the invention. Fig.2 illustrates another application of the invention.

Referring to Fig. 1,N represents a relay-in this instance the neutral relay of a quadruplex telegraph system. This relay responds to a certain class of currents in a manner well understood. Its armature-lever n is provided with a back contact-stop, n, and this stop is connected through the coils of an electro-magnet, S, with one pole of a battery, 0. The remaining pole of this battery is connected with the armature-lever a. When, therefore, thelever 4?. is remote from its electro-magnet the circuit of the battery is closed through the coils of the electro-magnet S. The armature t of this electro magnet will therefore be drawn tov ward the poles of the magnet and away from its back contact-stop, s. The electro-magnet S serves to reverse the signals received through the relay N, and may be conveniently termed a reversing-relay. The stop s is connected with one pole of abattery, 0, through the coils of a repeating-sounder, S", the remaining pole of which is connected with the armature R with the key K Uponthe completion,therefore,of the circuit of the electro-magnet N the, armature 15 will fall against its back contact-stop and the repeating-sounder S will become vitalized. The armature t of this sounder is provided with a front contact-stop, s and this is connected through the coils of a relay, R, by means of conductors land 2 with one pole of a battery, 0, the remaining pole of which is connected by a conductor, 3, with the earth at G. The battery 0 is the main battery for the single-wire or branch circuit Z, and currents are transmitted therefrom when the repeatingsounder S is actuated. To this end the armature t is connected by a conductor, 4, with a switch-point, a. The point a is applied to a switchlever, A, and this lever is connected with the line Z.

The operation of the apparatus thus far explained will be apparent; the signals received by .the relay N will be interpreted by the reversingrelay S and at the same time repeated by the sounder S from the battery 0 upon the single wire Z. It will be apparent, thus, that the repeating-sounder S performs the function of a key in the main circuit of the single line.

The switch A is provided with a second contact-point, (Z2, and this is connected by a conductor, 5, with a transmitting-key, K. The contact-point 7c of this key is connected by a conductor, 6,with the conductor 1, leading to the conductor 2 and battery 0 through the coils of the relay R. The position,therefore, of the relay R with relation to the single wire and the single-wire main battery is such asto render it possible to hear breaks on the single wire when any office thereon is receiving through the quadruplex. When the switch-arm A is placed in contact with the point a the line Z will be connected through the transmittingkey K with the battery 0, and signals may be transmitted and received through the line Z independently of the quadruplex system, ghe line being practically disconnected there rom.

For the purpose of receiving signals from the line Z a sounder, S included in the circuit of a local battery, 0 is applied to the relay R in a manner well understood. The in struments R, S and K compose a set of ordinary single-wire instruments, and may be placed upon an independent desk adjoining that of the quadruplex.

A third switch-point, a is applied to the switcharm A, and this point is connected by a conductor, 7, through the coils of a relay, The contact-point of the key K is connected by the conductor 8 with the conductor 2, leading to the battery 0. The relay R is provided with a front contactpoint, 1, and this is connected bya conductor, 9,with one pole of a battery, 0". The remaining pole of this battery is connected through the coils of an electromagnet, T, with the armature-lever t of the relay by a conductor, 10.

By placing the switch-armAin contact with e the point a and operating the key K currents will not only be sent upon the line Z from the battery 0, but the relay R will also be operated and the electro-magnet T will be vitalized and demagnetized in correspondence therewith. The instrument T is either of the quadruplex transmitters at the station represented, and it is applied to the system in the well-known manner, and the battery 0 is the one commonly employed for actuating the same. It will be seen, therefore, that the movements of the key K transmit not only into the single wire Z, but also to the quadruplex system. When, on the other hand, it is desired to transmit from the station on the single wire Z into the system, this will be accomplished so long as the switch-lever Ais in contact with the point a since the transmitter T will respond to the currents transmitted over the line Z through the relay R As already stated, the battery 0 is the one usually applied to the transmitter T, and thus the transmitter may be operated without the intervention of the relay R by the usual key, K. Especially is this true when the instrument is not in use by any single-wire station. The lever of this keyK is connected bya conductor, 11, with the conductor 10 upon one side of the instrument T, while its contactpoint k is connected with the conductor 9, thus including the battery 0. By operating the key K the circuit of the battery 0* will be made and interrupted and the instrument T will be operated. The combination of the armature-lever of relay It with key K and the circuit of the local battery 0 renders the use of an extra local battery unnecessary, the battery 0 supplying the current whether the circuit is closed by the key K or by the lever t at the point 1*.

Referring to Fig. 2, an organization is here shown whereby the necessity of employing a reversing-relay, S, is avoided. This modification consist-s merely in connecting the poles of the battery 0 through the coils of the sounder S with the armature and contact-stop of the relay N. In this instance this relay is represented as being the polarized relay of the quadruplex system. The stop at of this relay,to which the conductor leading from the sounder S" is connected, is the one against which the armature of the relay is thrown when the relay is actuated. It is evident that the same organization might be applied to the neutral relay N in Fig. 1.

I claim as my invention 1. The combination, substantially as hereinbefore set forth, with a relay of a quadrupleX telegraph system, of a single-wire or branch circuit, means for repeating from said IIO relay into said circuit, and means for transmitting and receiving over said circuit and at the same time repeating over or into said system, substantially as described.

2. The combination, substantially as hereinbefore set forth, with a relay and a transmitter of a quadrupleX telegraph system, of a branch conductor leading to an independent station, a repeatingsounder operated by said relay, a battery controlled by the movements of said repeating-sounder fortransmitting over said branch conductor, a. relay for operating said transmitter, a transmitting-key, and means for disconnecting said branch conductor from the first-named relay and connecting it with the second relay and said transmittingkey.

3. The combination, substantially as hereinbefore set forth, with either relay and either transmitter of a quadruplex telegraph, of a branch line, a battery for the same, a repeating-sounder responding to the operation of said relay, a second relay for controlling the movements of said transmitter, a transmitting key, and means for connecting said branch line, either with the repeatingsounder or with said second relay and key, at will.

4. lhe combination, substantially as hereinbefore set forth with a quadruplex telegraph system,ofabranch conductor, andathree-point switch, one of the points of which switch is connected with a repeating-sounder controlled by an instrument of said system, a second of which points is connected with independent transmitting and receiving apparatus, while the third is connected with apparatus controlling a transmitter of said system.

5. The combination, substantially as hereinbefore set forth, of the branch conductor,

the quadruplex transmitter, the local battery THOS. R. TALTAVALL.

Witnesses:

CAROLINE E. DAVIDSON, CHARLES A. TERRY. 

